Suction hook



FIG. 1 is a perspective view of the suction hook;

FIG. 2 is a front view of the suction hook;

FIG. 3 is a rear view of the suction hook;

FIG. 4 is a side view of the suction hook;

FIG. 5 is a top view of the suction hook; and,

FIG. 6 is a bottom view of the suction hook.

The broken lines depict environment and form no part of the claimed design. 

CLAIM The ornamental design for a suction hook, as shown, and described. 